VOA慢速英语2016.02.28
[audio]http://sound.yywz123.com/tingbbs/voa/voa20160228.mp3[/audio]The large study of about 200,000 subjects included data from three ongoing studies. Subjects in the study had to answer questions about their coffee drinking habits every four years over a 30-year period.___________________________However, the researchers found no link between coffee drinking and cancer.这项涉及大约20万研究对象的大型研究纳入了三项正在进行中的研究的数据.这项研究中的受试者在三十年间每四年必须就他们喝咖啡的习惯回答问题.________________________然而,研究人员发现喝咖啡和癌症之间并无关联.
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